Phys .org: Making masks smarter and safer against COVID-19

Phys .org: Making masks smarter and safer against COVID-19. “A new tool for monitoring COVID-19 may one day be right under your nose. Researchers at the University of California San Diego are developing a color-changing test strip that can be stuck on a mask and used to detect SARS-CoV-2 in a user’s breath or saliva.”

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